fasten up

1. The window doesn't fasten up.
这窗户关不紧。

来自《简明英汉词典》

2. Do not fasten all the windows up while you sleep.
睡觉时不要将所有的窗户都关紧。

来自《现代汉英综合大词典》

3. When you sew up to this end, fasten off the thread.
当你缝到这头时,把线打个结。

来自《简明英汉词典》